US7606296B1 - Decoding method and apparatus - Google Patents
Decoding method and apparatus Download PDFInfo
- Publication number
- US7606296B1 US7606296B1 US11/811,513 US81151307A US7606296B1 US 7606296 B1 US7606296 B1 US 7606296B1 US 81151307 A US81151307 A US 81151307A US 7606296 B1 US7606296 B1 US 7606296B1
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- Prior art keywords
- symbol
- subsymbol
- chips
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- waveform
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03375—Passband transmission
- H04L2025/03401—PSK
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
- H04L2025/03439—Fixed structures
- H04L2025/03445—Time domain
- H04L2025/03471—Tapped delay lines
- H04L2025/03484—Tapped delay lines time-recursive
- H04L2025/0349—Tapped delay lines time-recursive as a feedback filter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
Symbol={e j(φ1+φ2+φ3+φ4) ,e j(φ1+φ3+φ4) ,e j(φ1+φ2+φ4) ,−e j(φ1+φ4) ,e j(φ1+φ2+φ3) ,e j(φ1+φ3) ,−e j(φ1+φ2) ,e jφ1}
Subsymbol4={ej(φ1+φ2+φ3+φ4),ej(φ1+φ3+φ4) ,e j(φ1+φ2+φ4) ,−e j(φ1+φ4)}
factoring common terms, we have:
Subsymbol4 ={e j(φ2+φ3) ,e jφ3 ,e jφ2,−1}*e j(φ1+φ4)
Subsymbol4 ={e j(φ2),1,e jφ2,−1}*e j(φ1+φ4)
Subsymbol4 ={−j,1,−j,−1}*e j(φ1+φ4)
or
Subsymbol4 ={j,1,j,−1}*e j(φ1+φ4)
Subsymbol2 ={e jφ2,1}*e j(φ1+φ4)
Subsymbol6 ={e j(φ2+φ3+φ4) ,e j(φ3+φ4) ,e j(φ2+φ4) ,−e jφ4 ,e j(φ2+φ3) ,e jφ3 }*e jφ1
Claims (34)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/811,513 US7606296B1 (en) | 2001-11-29 | 2007-06-11 | Decoding method and apparatus |
Applications Claiming Priority (3)
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---|---|---|---|
US33434701P | 2001-11-29 | 2001-11-29 | |
US10/080,826 US7263119B1 (en) | 2001-11-29 | 2002-02-21 | Decoding method and apparatus |
US11/811,513 US7606296B1 (en) | 2001-11-29 | 2007-06-11 | Decoding method and apparatus |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/080,826 Continuation US7263119B1 (en) | 2001-11-29 | 2002-02-21 | Decoding method and apparatus |
Publications (1)
Publication Number | Publication Date |
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US7606296B1 true US7606296B1 (en) | 2009-10-20 |
Family
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Family Applications (4)
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US10/080,826 Active 2024-09-13 US7263119B1 (en) | 2001-11-29 | 2002-02-21 | Decoding method and apparatus |
US11/528,037 Expired - Fee Related US7746925B1 (en) | 2001-11-29 | 2006-09-27 | Decoding method and apparatus |
US11/811,513 Expired - Fee Related US7606296B1 (en) | 2001-11-29 | 2007-06-11 | Decoding method and apparatus |
US12/825,738 Expired - Fee Related US8059707B1 (en) | 2001-11-29 | 2010-06-29 | Decoding method and apparatus |
Family Applications Before (2)
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US10/080,826 Active 2024-09-13 US7263119B1 (en) | 2001-11-29 | 2002-02-21 | Decoding method and apparatus |
US11/528,037 Expired - Fee Related US7746925B1 (en) | 2001-11-29 | 2006-09-27 | Decoding method and apparatus |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US12/825,738 Expired - Fee Related US8059707B1 (en) | 2001-11-29 | 2010-06-29 | Decoding method and apparatus |
Country Status (1)
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US (4) | US7263119B1 (en) |
Cited By (18)
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US20080285641A1 (en) * | 2003-06-24 | 2008-11-20 | Qualcomm Incorporated | slicer input and feedback filter contents for block coded digital communications |
US20090135962A1 (en) * | 2007-11-22 | 2009-05-28 | Realtek Semiconductor Corp. | Digital slicing device |
US7986742B2 (en) | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US8059707B1 (en) | 2001-11-29 | 2011-11-15 | Marvell International Ltd. | Decoding method and apparatus |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8145179B2 (en) | 2002-10-25 | 2012-03-27 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8194770B2 (en) | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
US8203978B2 (en) | 2002-10-25 | 2012-06-19 | Qualcomm Incorporated | Multi-mode terminal in a wireless MIMO system |
US8208364B2 (en) | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8218609B2 (en) | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US8320301B2 (en) | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US8358714B2 (en) | 2005-06-16 | 2013-01-22 | Qualcomm Incorporated | Coding and modulation for multiple data streams in a communication system |
US8570988B2 (en) | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8855226B2 (en) | 2005-05-12 | 2014-10-07 | Qualcomm Incorporated | Rate selection with margin sharing |
US8873365B2 (en) | 2002-10-25 | 2014-10-28 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US9154274B2 (en) | 2002-10-25 | 2015-10-06 | Qualcomm Incorporated | OFDM communication system with multiple OFDM symbol sizes |
US9473269B2 (en) | 2003-12-01 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
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US7471735B2 (en) | 2001-04-27 | 2008-12-30 | The Directv Group, Inc. | Maximizing power and spectral efficiencies for layered and conventional modulations |
US7583728B2 (en) | 2002-10-25 | 2009-09-01 | The Directv Group, Inc. | Equalizers for layered modulated and other signals |
US8005035B2 (en) | 2001-04-27 | 2011-08-23 | The Directv Group, Inc. | Online output multiplexer filter measurement |
US7423987B2 (en) | 2001-04-27 | 2008-09-09 | The Directv Group, Inc. | Feeder link configurations to support layered modulation for digital signals |
US7778365B2 (en) | 2001-04-27 | 2010-08-17 | The Directv Group, Inc. | Satellite TWTA on-line non-linearity measurement |
US7209524B2 (en) * | 2001-04-27 | 2007-04-24 | The Directv Group, Inc. | Layered modulation for digital signals |
US7822154B2 (en) | 2001-04-27 | 2010-10-26 | The Directv Group, Inc. | Signal, interference and noise power measurement |
US7324433B1 (en) | 2001-11-29 | 2008-01-29 | Marvell International Ltd. | Method and apparatus for determining signal quality |
US7106803B1 (en) | 2002-06-26 | 2006-09-12 | Marvell International Ltd. | Phase shift keying wireless communication apparatus and method |
WO2004004193A2 (en) * | 2002-07-01 | 2004-01-08 | The Directv Group, Inc. | Improving hierarchical 8psk performance |
TWI279113B (en) | 2002-07-03 | 2007-04-11 | Hughes Electronics Corp | Method and apparatus for layered modulation |
EP1563620B1 (en) | 2002-10-25 | 2012-12-05 | The Directv Group, Inc. | Lower complexity layered modulation signal processor |
US7463676B2 (en) * | 2002-10-25 | 2008-12-09 | The Directv Group, Inc. | On-line phase noise measurement for layered modulation |
US7487350B2 (en) * | 2002-10-25 | 2009-02-03 | Grand Virtual, Inc. | Fixed client identification system for positive identification of client to server |
US7873128B2 (en) * | 2003-02-07 | 2011-01-18 | Broadcom Corporation | Method and system for equalization in a communications system |
US7324590B2 (en) * | 2003-05-28 | 2008-01-29 | Qualcomm Incoporated | Equalizer with combined CCK encoding-decoding in feedback filtering of decision feedback equalizer |
JP4359162B2 (en) * | 2004-02-24 | 2009-11-04 | 三洋電機株式会社 | Receiver |
US7463681B2 (en) * | 2004-05-13 | 2008-12-09 | Ittiam Systems (P) Ltd. | Architecture for feedback loops in decision feedback equalizers |
US7457357B2 (en) * | 2004-05-13 | 2008-11-25 | Ittiam Systems (P) Ltd. | Decision feedback equalizer design with interference removal and reduced error propagation |
US7990911B2 (en) * | 2004-12-22 | 2011-08-02 | Qualcomm Incorporated | Efficient ACK to NACK error detection |
US7881365B2 (en) * | 2007-10-31 | 2011-02-01 | Agere Systems Inc. | Demodulator with configurable adaptive equalizer |
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US9154274B2 (en) | 2002-10-25 | 2015-10-06 | Qualcomm Incorporated | OFDM communication system with multiple OFDM symbol sizes |
US8462643B2 (en) | 2002-10-25 | 2013-06-11 | Qualcomm Incorporated | MIMO WLAN system |
US10382106B2 (en) | 2002-10-25 | 2019-08-13 | Qualcomm Incorporated | Pilots for MIMO communication systems |
US7986742B2 (en) | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8750151B2 (en) | 2002-10-25 | 2014-06-10 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US9048892B2 (en) | 2002-10-25 | 2015-06-02 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8873365B2 (en) | 2002-10-25 | 2014-10-28 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US8913529B2 (en) | 2002-10-25 | 2014-12-16 | Qualcomm Incorporated | MIMO WLAN system |
US8934329B2 (en) | 2002-10-25 | 2015-01-13 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US9013974B2 (en) | 2002-10-25 | 2015-04-21 | Qualcomm Incorporated | MIMO WLAN system |
US9031097B2 (en) | 2002-10-25 | 2015-05-12 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8290025B2 (en) * | 2003-06-24 | 2012-10-16 | Qualcomm Incorporated | Slicer input and feedback filter contents for block coded digital communications |
US20080285641A1 (en) * | 2003-06-24 | 2008-11-20 | Qualcomm Incorporated | slicer input and feedback filter contents for block coded digital communications |
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Also Published As
Publication number | Publication date |
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US7263119B1 (en) | 2007-08-28 |
US7746925B1 (en) | 2010-06-29 |
US8059707B1 (en) | 2011-11-15 |
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